I've been adding cal and alk when I add my top off water for the last few months but I'm getting to where this is not the best thing to do as the demand is going up. I have a Aqua Medic reef doser with two pumps. I set it up tonight and have it running into two measuring cups to see how much is being dosed over 24 hours. My question is how often should I have it dose? I have it set to every 30 minutes. Is that good? I really would like someone to tell me what they think because I can't seem to decide.

